Damn man, I've been averaging every 6 years... I'd say I won't do that anymore (it sucked in the past, though clearly not enough to annoy me into purchase), but it actually seems easier to do that these days without missing out on all the games. 6 is still pushing it though, but 4 is very doable, barring another shader-engine-arms-race type of situation (I'm two years in and not feeling any obsolescence).

If it's your hobby though......